<template>
<div>
            <!-- 导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>参数列表</el-breadcrumb-item>       
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 警告区域 -->
        <el-alert title="注意" type="warning" :closable="false"  show-icon>   
        </el-alert> 
        <!-- 选择商品分类区域 -->     
        <el-row class="cat-opt">
            <el-col>
                <span>请输入分类名称：</span>
                <!-- 选择商品分类的级联选择框 -->
                <el-cascader v-model="selectedCateKeys" :options="cateList" :props="cascaderProps"
                @change="handleChange"></el-cascader>
            </el-col>
        </el-row>

        <!-- tabs页面标签 -->
        <el-tabs v-model="activeName" @tab-click="handleClick">
            <!-- 动态参数面板 -->
            <el-tab-pane label="动态参数" name="many">
                <!-- 添加参数按钮 -->
                <el-button type='success' size='mini' :disabled='isBtnDisabled' @click="addDialogVisible=true">添加参数</el-button>
                <!-- 动态参数表格 -->
                <el-table :data='manyTableData' border stripe>
                    <!-- 展开行 -->
                    <el-table-column type='expand'>
                          <template slot-scope="scope">
                              <!-- 循环渲染tag标签 -->
                            <el-tag v-for="(items,index) in scope.row.attr_vals"
                                :key="index" closable @close='handleClose(index,scope.row)'>
                               {{items}}
                         
                            </el-tag>
                            <!-- 输入tag文本框 -->
                            <el-input class="input-new-tag"  v-if="scope.row.inputVisible" v-model="scope.row.inputValue"                               
                              ref="saveTagInput"   size="small"                           
                               
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                                >
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                        </template>
                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type='index'></el-table-column>
                    <el-table-column label='参数名称' prop='attr_name'>
                    </el-table-column>
                    <el-table-column label='操作'>
                        <template  slot-scope="scope">
                            <el-button type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                
                </el-table>
            </el-tab-pane>
            <!-- 静态属性面面板 -->
            <el-tab-pane label="静态属性" name="only">
                <!-- 添加属性按钮 -->
                <el-button type='success' size='mini' :disabled='isBtnDisabled' @click="addDialogVisible=true">添加属性</el-button>
                <!-- 静态属性表格区域 -->
                 <el-table :data='onlyTableData' border stripe>
                    <!-- 展开行 -->
                    <el-table-column type='expand'>
                        <template slot-scope="scope">
                              <!-- 循环渲染tag标签 -->
                            <el-tag v-for="(items,index) in scope.row.attr_vals"
                                :key="index" closable @close='handleClose(index,scope.row)'>
                               {{items}}
                         
                            </el-tag>
                            <!-- 输入tag文本框 -->
                            <el-input class="input-new-tag"  v-if="scope.row.inputVisible" v-model="scope.row.inputValue"                               
                              ref="saveTagInput"   size="small"                           
                               
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)"
                                >
                            </el-input>
                            <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>

                        </template>

                    </el-table-column>
                    <!-- 索引列 -->
                    <el-table-column type='index'></el-table-column>
                    <el-table-column label='属性名称' prop='attr_name'>
                    </el-table-column>
                    <el-table-column label='操作'>
                        <template  slot-scope="scope">
                            <el-button  size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                            <el-button  size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                        </template>
                    </el-table-column>
                
                </el-table>
            </el-tab-pane>

        </el-tabs>
       
    </el-card>


    <!-- 添加参数/属性对话框 -->
    <el-dialog :title="'添加'+ titleText"  :visible.sync="addDialogVisible" width="50%"
    @close='addDialogClosed'>
        <el-form :model='addForm' :rules='addFormRules' ref="addFormRef" label-width='100px'>
            <el-form-item :label='titleText' prop='attr_name'>
                <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addFormData">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 展示编辑修改的对话框 -->
    <el-dialog :title="'编辑'+ titleText"  :visible.sync="editDialogVisible" width="50%"
    @close="editDialogClosed">
        <el-form :model='editForm' :rules='editFormRules' ref="editFormRef" label-width='100px'>
            <el-form-item :label='titleText' prop='attr_name'>
                <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
        </span>
    </el-dialog>




</div>
    
</template>
<script>
export default {
    data(){
        return{

            // 商品列表
            cateList:[],
            // 级联选择框的配置对象
            cascaderProps:{
                expandTrigger:'hover',
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            // 级联选中的商品的id数组
            selectedCateKeys:[],
             // 被激活的页签的名称
            activeName: 'many',
            // 动态参数面板数据
            manyTableData:[],
            // 静态属性面板数据
            onlyTableData:[],

            // 添加参数表单数据
            addForm:{
                attr_name:''
            },
            // 表单验证规则对象
            addFormRules:{
                attr_name:[
                    {required:true,message:'请输入参数名称',trigger:'blur'}
                ]
            },
            // 控制添加参数、属性对话框
            addDialogVisible:false,
            // 编辑参数对话框
            editDialogVisible:false,

            // 修改表单数据对象
            editForm:{
            },

            // 修改表单数据对象规则
            editFormRules:{
                attr_name:[
                    {required:true,message:'请输入参数名称',trigger:'blur'}
                ]
            },
            // 控制input-new-tag
            // inputVisible:false,
            // 文本框中输入的内容
            // inputValue:''

          

            

        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        // 获取商品分类列表
        async getCateList(){
            const {data:res} =await this.$http.get('categories')
            
            if(res.meta.status!==200) return window.$message.error('商品分类数据列表失败')
            this.cateList=res.data

            // console.log(this.cateList)
           
            
            
        },
        // 级联选择框选中项变化，会触发这个函数
        handleChange(){
            this.getParamsData()


        },
        // 获取级联选择框的参数
        async getParamsData(){
            // 证明选择的不是第3级
            if(this.selectedCateKeys.length!==3){
                this.selectedCateKeys =[]
                this.manyTableData=[]
                this.onlyTableData=[]
                return 

            }
            // 选择是第3级
            // console.log(this.selectedCateKeys)
            // 根据所选分类的Id，和当前所处的面板，获取对应的参数
            const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})

            if(res.meta.status!==200){
                return this.$message.error('获取失败')
            }

            res.data.forEach(item=>{
                // 先判断attr_vals是否为空
              item.attr_vals=item.attr_vals? item.attr_vals.split(' '):[]
                // 控制tag文本框的显示与隐藏
                item.inputVisible=false
                // tag输入的值
                item.inputValue=''
            
            })
            console.log(res.data)

            if(this.activeName==='many'){
                // 动态参数面板
                this.manyTableData=res.data
            }else{
                this.onlyTableData=res.data
            }

        },
        
        // tab页面点击事件的处理函数
        handleClick(){
            console.log(this.activeName)
            this.getParamsData()
            

        },
        // 点击确定，提交添加参数表单数据
       addFormData(){
        //    console.log(this.cateId)
        this.$refs.addFormRef.validate(async valid=>{
            // console.log(valid)
            const {data:res}=await this.$http.post(`categories/${this.cateId}/attributes`,{
                attr_name:this.addForm.attr_name,
                attr_sel:this.activeName
            })

            // console.log(res.data)
             if (res.meta.status !== 201) {
                return this.$message.error('添加参数失败！')
            }
            this.$message.success('添加参数成功！')
            this.addDialogVisible=false
            this.getParamsData()
        })
        },

        // 重置添加的表单
        addDialogClosed(){
            
            this.$refs.addFormRef.resetFields()

        },
        // 点击编辑按钮，展示编辑对话框
       async showEditDialog(attr_id){
        //    console.log(attr_id)
           // 根据 ID 查询参数
            const {data:res} =await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{

                attr_sel:this.activeName

            })
            // console.log(res.data)
             if (res.meta.status !== 200) {
                return this.$message.error('获取参数信息失败！')
            }
            this.editForm=res.data
            this.editDialogVisible=true
        },
        // 重置修改的表单
        editDialogClosed(){
            
            this.$refs.editFormRef.resetFields()

        },
        // 点击确定，提交编辑好的信息
       editParams(){
           this.$refs.editFormRef.validate(async valid=>{
            // console.log(valid)
            const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
                attr_name:this.editForm.attr_name,
                attr_sel:this.activeName,

            })

            // console.log(res.data)
             if (res.meta.status !== 200) {
                return this.$message.error('修改参数失败！')
            }
            this.$message.success('修改参数成功！')
            this.editDialogVisible=false
            this.getParamsData()
        })
            
           

        },
        // 删除参数
        async removeParams(attr_id){

        const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
        }).catch(err=>err)

        // console.log(confirmResult)
        if(confirmResult!=='confirm'){
            this.$message.info('已取消删除')
            return

        }
        const {data:res} =await this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`)
        if(res.meta.status !== 200){
            return this.$message.error('删除失败')

        }
        this.$message.success('删除成功')
        this.getParamsData()



        },
        // input-tag 文本框失去焦点，还是已点击
        async  handleInputConfirm(row){
            // 没有输入内容
            if(row.inputValue.trim().length===0){
                row.inputValue=''
                row.inputVisible=false
                return


            }
            // 如果输入内容
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue=''
            row.inputVisible=false

            // 发起请求，保存操作的数据
            this.saveAttr(row)
         



        },
        // 发起请求，保存操作的数据
        async saveAttr(row){
               const {data:res}= await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                attr_name :row.attr_name ,
                attr_sel  :row.attr_sel,
                attr_vals :row.attr_vals.join('')
            })
            if(res.meta.status !== 200){
                return this.$message.error('修改Tag失败')

            }
            this.$message.success('修改Tag成功')

        },
        // 点击按钮，展示tag文本输入框
        showInput(row){
            row.inputVisible=true

            // 文本框自动获取焦点
            // $nextTick作用：当页面上元素被重现渲染之后，才会执行回调函数
            this.$nextTick(_ => {
            this.$refs.saveTagInput.$refs.input.focus();
            });
        },


        // Tag参数的删除
        handleClose(index,row){
            row.attr_vals.splice(index,1)
            this.saveAttr(row)

        }
            


    },

    computed:{
        isBtnDisabled(){
            if(this.selectedCateKeys.length!==3){
                return true

            }
            return false
        },
        // 当前选中的三级分类的id
        cateId(){
            if(this.selectedCateKeys.length ===3){
                return this.selectedCateKeys[2]

            }
            return null
        },
        // 动态选择添加参数、属性对话框
        titleText(){
            if(this.activeName==='many'){
                return '动态参数'
            }
             return '静态属性'
        }

    }
 
 

}
</script>

<style lang="less" scoped>
.cat-opt{
    margin-top: 15px;
}
.input-new-tag{
    width: 120px;
}
</style>